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Investments (Tables) | 12 Months Ended
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Dec. 31, 2019
Investments, All Other Investments [Abstract] |
Schedule of Available for Sale Securities Reconciliation | The cost, gross unrealized gains (losses) and fair value of available for sale securities by major security type at December 31, 2018 were as follows:
|  |  |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
December 31, 2018 |  | Cost |  |  | Gain |  |  | Loss |  |  | Value |
Investments - short term |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury Notes |  | $ | 302 |  |  | $ | 1 |  |  | $ | - |  |  | $ | 303 |
Corporate bonds and commercial paper |  |  | 91 |  |  |  | - |  |  |  | - |  |  |  | 91 |
Total investments - short term |  |  | 393 |  |  |  | 1 |  |  |  |  |  |  |  | 394 |
Investments - long term |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury Notes |  |  | 1,569 |  |  |  | - |  |  |  | (2 | ) |  |  | 1,567 |
Government agency bonds |  |  | 1,548 |  |  |  | - |  |  |  | (23 | ) |  |  | 1,525 |
Corporate bonds |  |  | 1,062 |  |  |  | - |  |  |  | (23 | ) |  |  | 1,039 |
Total investments - long term |  |  | 4,179 |  |  |  | - |  |  |  | (48 | ) |  |  | 4,131 |
Total investments - available for sale |  | $ | 4,572 |  |  | $ | 1 |  |  | $ | (48 | ) |  | $ | 4,525 |

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- Definition Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value. + References No definition available. + Details
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